J. Clayton's quarterly grades: "The Steelers, St. Louis Rams, Houston Texans and Kansas City Chiefs deserve A grades because their starts exceeded expectations. The Steelers went 3-1 without Ben Roethlisberger. The Texans finally beat the Indianapolis Colts and lead the AFC South. The Rams have already doubled their win total from last season and have the league's next quarterback star, Sam Bradford. The Chiefs have used big plays and strong play at home to go 3-0."